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Upper bound analysis of differential velocity sideways extrusion process for curved profiles using a fan-shaped flow line model

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Title: Upper bound analysis of differential velocity sideways extrusion process for curved profiles using a fan-shaped flow line model
Authors: Zhou, W
Shi, Z
Lin, J
Item Type: Journal Article
Abstract: An analytical model for predicting the shapes of rectangular bars with variable curvatures along their lengths through a novel forming method, differential velocity sideways extrusion (DVSE), previously proposed by the authors, has been developed on the basis of the upper bound method. A new flow line function was presented to describe its deformation field. The plastic deformation zone (PDZ) was assumed to be fan-shaped, where the trajectory of the material flow within the PDZ had an elliptic shape. The proposed continuous flow line function was validated using finite element simulations. The flow patterns, extrusion pressure, curvature, and effective strain predicted by the analytical solutions agreed well with modelling results. Compared to the classical discontinuous simple shear model of channel angular extrusion (CAE) with a 90° die, the new approach was shown to predict the effective strain more closely.
Issue Date: 26-Mar-2018
Date of Acceptance: 16-Mar-2018
URI: http://hdl.handle.net/10044/1/58826
DOI: 10.1016/j.ijlmm.2018.03.004
ISSN: 2588-8404
Publisher: Elsevier
Start Page: 21
End Page: 32
Journal / Book Title: International Journal of Lightweight Materials and Manufacture
Volume: 1
Issue: 1
Copyright Statement: © 2018 The Author. Publishing Services provided by Elsevier B.V. on behalf of KeAi. This is an open access article under the CC BY-NC-ND license ( http:// creativecommons.org/licenses/by-nc-nd/4.0/ )
Sponsor/Funder: Engineering & Physical Science Research Council (E
Funder's Grant Number: EP/R001715/1 / PO 2105860
Publication Status: Published
Open Access location: https://doi.org/10.1016/j.ijlmm.2018.03.004
Online Publication Date: 2018-03-26
Appears in Collections:Mechanical Engineering
Faculty of Engineering